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DIN 931 Zinc Plated Carbon Steel Hex Head Bolts Partially Threaded Metric Fasteners

Global Shipping Available.
OEM & Custom Manufacturing.
Large-Volume Orders Supported.
Tender & Project Order Support.
Multiple Surface Finishes.
Strict Quality Control.
Material Certificates Available.

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Product Description

DIN 931 Zinc Plated Carbon Steel Hex Head Bolts are partially threaded metric fasteners designed for machinery assembly, steel structure connection, equipment installation, construction hardware, and general industrial fastening.

This product features a hex head, carbon steel body, zinc plated surface, and partially threaded shank. Compared with fully threaded bolts, the DIN 931 partial thread design includes a smooth shank section, which helps improve positioning and provides stable support in assembled parts.

For buyers, this product solves a common procurement problem: choosing the correct bolt type when the application requires a smooth shank plus threaded end, not a fully threaded DIN 933 bolt.

Key Product Features

DIN 931 standard hex head bolt
Carbon steel material
Zinc plated surface finish
Partially threaded structure
Metric thread design
Hex head for wrench or socket installation
Suitable for use with matching nuts and washers
Designed for machinery, construction, equipment, and metal assembly

Product Specifications

Item	Descripción
Product Name	DIN 931 Zinc Plated Carbon Steel Hex Head Bolt
Estándar	DIN 931
Material	Carbon Steel
Tratamiento de superficies	Zinc Plated
Surface Color	Silver Zinc
Tipo de cabeza	Hex Head
Thread Design	Partially Threaded
Tipo de hilo	Metric Thread
Body Structure	Smooth Shank + Threaded End
Fastening Method	Used with Nut, Washer, or Threaded Hole
Product Category	Hex Bolt / Partially Threaded Bolt / Metric Fastener

What Procurement Problems Does This Bolt Solve?

Purchasing Problem	How This Product Helps
Wrong standard selection	DIN 931 is clearly used for partially threaded hex bolts.
Confusion with DIN 933	DIN 931 has a smooth shank section, while DIN 933 is fully threaded.
Need for stable positioning	The smooth shank helps keep parts aligned during assembly.
Need for surface protection	Zinc plating helps protect the carbon steel surface from oxidation.
Tool compatibility	Hex head design works with standard wrenches, sockets, and torque tools.
Assembly matching	Can be paired with matching metric nuts and washers.

DIN 931 vs DIN 933

Estándar	Tipo de hilo	Main Difference
DIN 931	Partially Threaded	Has a smooth shank and threaded end
DIN 933	Fully Threaded	Thread runs along the full bolt body

This product is DIN 931, because it has a clear smooth shank section between the hex head and the threaded part.

Material and Surface Finish

The bolt is made from carbon steel, which is widely used in industrial fasteners for practical strength and cost-effective performance.

The zinc plated finish gives the bolt a silver metallic appearance and provides surface protection for general industrial use.

Material	Surface Finish	Appearance	Function
Carbon Steel	Zinc Plated	Silver Metallic	Helps improve surface protection and appearance

Product Structure

Part	Function
Hex Head	Allows tightening with wrench, socket, or torque tool
Smooth Shank	Helps with alignment, positioning, and stable assembly
Threaded End	Provides fastening engagement with nut or threaded hole
Zinc Plated Layer	Protects the carbon steel surface
Carbon Steel Body	Provides durable fastening performance

Common Applications

Application Area	Typical Use
Machinery Assembly	Machine frames, equipment bodies, mechanical connections
Construction Hardware	Steel brackets, support plates, installation components
Steel Structure	Metal frame connection and structural component fastening
Automotive & Repair	Brackets, chassis-related parts, maintenance fastening
Industrial Equipment	Production equipment, fixing systems, replacement bolts
Metal Fabrication	Steel plates, fabricated frames, hardware assembly

Buying Guide for DIN 931 Hex Bolts

When purchasing DIN 931 zinc plated carbon steel hex bolts, buyers should confirm the following information before ordering:

Required Information	Why It Matters
Diameter	Ensures the bolt fits the hole and nut
Length	Determines assembly thickness compatibility
Thread Length	Important for partial thread engagement
Material	Confirms carbon steel requirement
Surface Finish	Confirms zinc plated appearance and protection
Quantity	Affects quotation, packing, and delivery planning
Matching Parts	Nuts and washers may be required for complete assembly

Installation Notes

Step	Recommendation
Check Standard	Use DIN 931 when a partially threaded bolt is required.
Match Thread	Use compatible metric nuts or threaded holes.
Use Proper Tool	Tighten with a matching wrench or socket.
Add Washer	Use washers when load distribution is required.
Check Assembly	Ensure the smooth shank and threaded section fit the application correctly.

Preguntas frecuentes

1. What is a DIN 931 bolt?

A DIN 931 bolt is a metric hex head bolt with a partially threaded shank. It has a hex head, smooth shank section, and threaded end.

2. What material is this bolt made from?

This bolt is made from carbon steel.

3. What is the surface treatment?

The surface treatment is zinc plated.

4. Is this bolt fully threaded?

No. This is a partially threaded bolt.

5. What is the difference between DIN 931 and DIN 933?

DIN 931 is partially threaded. DIN 933 is fully threaded.

6. What tools are used for installation?

It can be installed with a wrench, socket, or torque tool that matches the hex head size.

7. Can this bolt be used with nuts and washers?

Yes. DIN 931 hex bolts are commonly used with matching metric nuts and washers.

8. What applications is this bolt suitable for?

It is suitable for machinery assembly, construction hardware, steel structure connection, equipment installation, metal fabrication, and general industrial fastening.

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